Joist



FIG. 1 is a top, left side and end perspective view of a joist according to our invention;

FIG. 2 is a bottom, right side and end perspective view of the joist thereof;

FIG. 3 is an end elevational view thereof, the opposite end being a mirror-image thereof;

FIG. 4 is a left side elevational view thereof with the right side being a mirror-image thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The joist has been broken away in the center to indicate indeterminate length. 

The ornamental design for a "joist," as shown and described. 